Best practice: It is always a good idea to wrap {{this | json}} or {{this.collection_name | json}} in
a <pre> element so the output is nicely formatted.

At this point you will get both the original webapp listing and the dump of the myWebapp collection.

Because we have access to the collection items directly in the page context it
means we can use Liquid to loop and process the collection items directly in the
page. Let's add some logic to loop and render the items:

At this point the webapp listing should appear twice on your page. That happens
because it is rendered once by the module according to the custom layout we specify
and the other is rendered using the myWebapp collection.

To suppress the module's output and only use the collection loop we will need
to replace the template="/layouts/custom/car_collection.tpl" parameter
with template="" - this basically instructs the
module to suppress its output and only create the collection. Take a look at
this section for more info on suppressing a module's output.